Hey Gina: Take the wheels to the stable and put them on my machine one at a time. Take off my 80 grit and replace with one of your wheels, check and repeat.
OR...before you go to my house-put the old wheels back on and see if it vibrates. If not, check the new wheels one at a time.
I have both a tile saw and a Lil Trimmer lapidary saw. use the Lil Trimmer with a super yhin lapidary blade to cut the good stuff. I use the tile more though. I put a lapidary blade on it.
I have used it inside during the winter by setting it up in the walk in shower-turn the saw around so the spray hits the shower wall and pull the rock towards you to cut...in fact, I always cut from the back of the saw, so I don't get wet.